<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <link rel="stylesheet" href="./css/inputnumber.css" />
  <link rel="stylesheet" href="./css/index.css" />
  <title>购物车</title>
</head>

<body>
  <div class="app-container" id="app">
    <!-- 顶部banner -->
    <div class="banner-box"><img src="img/fruit.jpg" alt="" /></div>
    <!-- 面包屑 -->
    <div class="breadcrumb">
      <span>🏠</span>
      /
      <span>购物车</span>
    </div>
    <!-- 购物车主体 -->
    <div class="main" v-if="fruitList.length>0">
      <div class="table">
        <!-- 头部 -->
        <div class="thead">
          <div class="tr">
            <div class="th">选中</div>
            <div class="th th-pic">图片</div>
            <div class="th">单价</div>
            <div class="th num-th">个数</div>
            <div class="th">小计</div>
            <div class="th">操作</div>
          </div>
        </div>
        <!-- 身体 -->
        <div class="tbody">
          <div class="tr" :class="{active:item.isChecked}" v-for="(item,index) in fruitList" :key="item.id">
            <div class="td"><input type="checkbox" v-model="item.isChecked" checked /></div>
            <div class="td"><img src="img/火龙果.png" alt="" /></div>
            <div class="td">{{item.price}}</div>

            <div class="td">
              <div class="my-input-number">
                <button :disabled="item.num <=1 " class="decrease" @click="sub(item.id)"> - </button>
                <span class="my-input__inner">{{item.num}}</span>
                <button class="increase" @click="add(item.id)"> + </button>
              </div>
            </div>
            <div class="td">{{item.price*item.num}}</div>
            <div class="td"><button @click="del(item.id)">删除</button></div>
          </div>

          <div class="tr">
            <div class="td"><input type="checkbox" /></div>
            <div class="td"><img src="img/荔枝.png" alt="" /></div>
            <div class="td">7</div>
            <div class="td">
              <div class="my-input-number">
                <button disabled class="decrease"> - </button>
                <span class="my-input__inner">1</span>
                <button class="increase"> + </button>
              </div>
            </div>
            <div class="td">14</div>
            <div class="td"><button>删除</button></div>
          </div>
        </div>
      </div>
      <!-- 底部 -->
      <div class="bottom">
        <!-- 全选 -->
        <label class="check-all">
          <input type="checkbox" v-model="isAll" />
          全选
        </label>
        <div class="right-box">
          <!-- 所有商品总价 -->
          <span class="price-box">总价&nbsp;&nbsp;:&nbsp;&nbsp;¥&nbsp;<span class="price">24</span></span>
          <!-- 结算按钮 -->
          <button class="pay">结算( 6 )</button>
        </div>
      </div>
    </div>
    <!-- 空车 -->
    <div class="empty">🛒空空如也</div>
  </div>
  <script src="../vue.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        // 水果列表
        fruitList: [
          {
            id: 1,
            icon: 'img/火龙果.png',
            isChecked: true,
            num: 2,
            price: 6,
          },
          {
            id: 2,
            icon: 'img/荔枝.png',
            isChecked: false,
            num: 7,
            price: 20,
          },
          {
            id: 3,
            icon: 'img/榴莲.png',
            isChecked: false,
            num: 3,
            price: 40,
          },
          {
            id: 4,
            icon: 'img/鸭梨.png',
            isChecked: true,
            num: 10,
            price: 3,
          },
          {
            id: 5,
            icon: 'img/樱桃.png',
            isChecked: false,
            num: 20,
            price: 34,
          }
        ]
      },
      methods: {
        // 删除
        del(id) {
          this.fruitList = this.fruitList.filter(item => item.id != id)
        },
        add(id) {
          const fruit = this.fruitList.find(item => item.id === id)
          fruit.num++;
        },
        sub(id) {
          const fruit = this.fruitList.find(item => item.id === id)
          fruit.num--;
        },
      },

      //全选反选
      computed: {
        isAll: {
          get() {
            return this.fruitList.every(item => item.isChecked)
          },
          set(value) {
            this.fruitList.forEach(item => item.isChecked = value)
          }
        }
      },
      //计算总价
      totalCount() {
        return this.fruitList.reduce((sum, item) => {
          // 计算选中的总数
          if (item.isChecked) {
            return sum + item.num;
          } else {
            return sum
          }
        }, 0);
      },
      totalPrice() {
        // 计算选中的总价
        return this.fruitList.reduce((sum, item) => {
          if (item.isChecked) {
            return (sum + item.num) * item.price;
          } else {
            return sum
          }
        }, 0);
      }
    })
  </script>
</body>
</html>